So just how tough are you? There's only one way to find out -- crawl into a tent pitched on the ice sheets of Antarctica. Seriously. If you've got the dough (these trips are expensive -- we're talking five figures here), you can do it [sources: Antarctica Bound, Kensington Tours].

If you book with Antarctica Bound, a cruising outfit, an optional camping excursion is sometimes offered. You'll snooze in sleeping bags slid into tents set into the shore of the Errera Channel, after you've noshed on the delicious dinner your guides cooked for you. They'll even set up a portable toilet, which seems a bit like cheating [source: Antarctica Bound]. But it's more like roughing it compared to the camping experience offered by Kensington Tours.

Signing on with Kensington means you'll be deposited on top of a 200-foot (61-meter) icefall into a luxury eco-camp. Set up African safari-style, the camp consists of two large, heated, canvas dome tents that contain a dining room, library, kitchen and communications area. Six sleeping tents, also heated, hold two apiece. In between dozing in your posh digs and eating meals cooked by a South African gourmet chef, you'll get to explore Antarctica through kite skiing, rock- and ice-climbing, abseiling -- aka rappelling -- and more [source: Kensington Tours].